CVE-2025-47700: Mattermost Server SSRF Vulnerability via the Agents Plugin

August 21, 2025 (updated August 29, 2025)

Mattermost Server versions 10.5.x <= 10.5.9 utilizing the Agents plugin fail to reject empty request bodies which allows users to trick users into clicking malicious links via post actions

References

github.com/advisories/GHSA-vqwh-5jhh-vc9p
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2025-47700
pkg.go.dev/vuln/GO-2025-3906

Code Behaviors & Features

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